Dental tool.



PATENTED JUNE 23, 1908.

No. 891,54s

B. Y. HAUGHAWOUT.A

DENTAL TOOL, APPLICATION FILED FEB. Z8, 1908.

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ELMORE YOCOME HAUGHAWOUT, OF CEDAR'. RAPIDS, NEBRASKA.

DENTAL TOOL.

j Specification of Letters Patent. Application filed February 28, 1908.Serial No. 418,391.

Patented June 23, 1908.

To all whom it may concern:

Be. it known that I, ELMoRE YoooME HAUGHAwoUT, a citizen of the UnitedStates, residing at OedarlRapids, in the county of Boone and State ofNebraska, have invented certain new and useful Improvements in DentistsTools, of which the following is a specification.

This invention is a tool or instrument for the use of dentists, havingthe type of a hand vise or holder, and particularly adapted for holdingporcelain facings or teeth while they are being prepared for crown. orbridge work.

Every facing must be ground more or less, to suit the individual case,and after being ground the facings must be polished and then backed orburnished with metal.

The tool forming the subject of the invention is designed to securelyhold the facing or the like while the several operations are beingperformed.

The invention is illustrated in the accompanying drawings, in whichFigure 1 is a perspective view of the tool with a facing held therein.Fig. 2 is a longitudinal section. Fig. 3 is a side view of amodification.

Referring specifically to the drawings, 6 indicates a rod which isflattened and offset at one end, as indicated at 7, to form a aw, theflattened portion being provided with holes 8 adapted to receive thepins on the back of the facing 9. At its rear end the rod has a button10.

The rod above described works loosely through a tube 11, of less lengththan said rod, and this tube is provided at its rear end with fingerpieces 12 for convenient manipulation of the parts. At its front end thetube has a forwardly extending lip or jaw 13 which cooperates with thejaw 7, being oppositely disposed with respect.thereto when the parts arein holding position. The tube also has near its front end a set screw 14which when screwed in bears against the back of the rod 6 and pressesthe jaw 7 toward the jaw 13. A spring 15 is coiled around the rodbetween the finger pieces 10 and 12. l

The rod 6 is capable of longitudinal movement withinthe tube 11, wherebyit is accommodated to various shapes and sizes of fac ings, and alsoenables a facing to be readily inserted between the jaws. To grasp afaclng in the holder the set screw 14 is loosened Fig. 3 I show a camand the button 10 is pressed to advance the jaw 7 beyond the end of thejaw 13. The facing can be then placed on the jaw 7, with the pinsextending through the holes 8. The pressure is then released, allowingthe spring 15 to retract the rod and bring the jaws 7 and 13 opposite,with the facing between. The set screw 14 is then turned enough to pressthe jaw 7 toward the jaw 13, sufficient pressure being applied to graspthe facing firmly and hold the same in proper position. When so held,the facing can be ground, polished or otherwise worked. Thelongitudinal'movement of the jaws with respect to each other, as well astheir movement laterally toward and from each other, allows facings orteeth of irregular size and shape to be grasped and firmly held.V

Instead of the set screw 14, other means may be used to clamp the jaws.Thus, in

lever 20 which is pivotally mounted upon the tube and arranged to bearupon the movable jaw or rod, to press the jaws together. This has theadvantage that it is quick acting and may be manipulated by the handholding the tool.

I claim:

1. A tool comprising a tube having a rojecting jaw at one end, a rodexten ing through the tube and movable lengthwise without rotationtherein and having a jaw which coperates with said jaw, a spring betweenthe tube and rod, tending to retract the latter, and means to press thejaws toward each other.

2. A tool com rising a tube having a jaw at the front en a rod slidablelengthwise without rotation in the tube and having a jaw at the frontend provided with holes to receive facing pins, and means to press thejaws toward each other.

3. A tool comprising a tube having a jaw at the front end and a ngerpiece at the rear end, a rod extending throu h the tube and having a jawat the front en a spring coiled around the rod and tending to retractthe same, and a set screw in the front end of the tube, bearing againstthe rod to press the jaws together.

In testimony whereof I aflix my signature, in presence of two witnesses.

ELMORE YOCOME HAUGHAWOUT. Witnesses:

E. L. SARGENT, A. D. SMITH.

